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' 10 Instrumentation <br />Twelve vibrating wire piezometers have been installed by Barr in addition to the five that were <br />installed by previous consultants (see Appendix A). It is anticipated that all of these will remain <br />operable during and after construction, as no fill will be placed at any of the locations containing <br />instrumentation. <br />The inclinometers installed by Western Engineers (1993) provided valuable information regarding <br />the location of the landslide failure surface. They were sheared off, however, within one to two years <br />after they were installed. They will not be read in the future so they do not need to be protected <br />during construction, but it is not anticipated that any fill will be placed on them. <br />After construction is completed, it is anticipated that a number of survey mirrors will be placed on <br />and around the dam to monitor long-term movement. They will be read by a robotic total station <br />located atop the mountain north of the dam. <br />P:\Mpls\06 CO\26\0626067\WorkFiles\DesignReport\FINAL\DesignReportFINAL.doc 46 <br />